Most coaches despise them, saying they detract from the very nature of team sport.
Most goaltenders enjoy the challenge, but would rather see games decided in regulation or overtime.
They are just five games into the season and already the Capitals are making a habit of working overtime.
Eight years later, even as Nicklas Backstrom plays in his 500th NHL game, the video is as intriguing as it is entertaining.
Some wondered if it could ever be done.
Find out about the toughness that Capitals coach Barry Trotz has had his entire career and how he brought with him into his coaching career.